Why Superstars like Oprah and Sheryl Sandberg Swear by Early Bedtime

Going to bed early might be uncool, but it will make you happier, healthier, and probably improve your bottom line, reports Inc.

One night “I called Mark [Zuckerberg] at 9 p.m. He said he was at a dinner and asked if he could call later so I told him I’d be up for another 30 minutes,” Sandberg related on Quora. “The next morning he reached out asking if I was feeling ok; he assumed that I’d been sick since I went to bed at 9:30 p.m. I explained that with two young children, 9:30 p.m. was often my normal bed time.”